Blocking polysulfide by physical confinement and catalytic conversion of SiO<inf>2</inf>@MXene for Li-S battery

Zhang, C; Feng, J; Guo, X; Zhang, J; Zhang, W; Zhang, L; Song, J; Shao, G; Wang, G

Blocking polysulfide by physical confinement and catalytic conversion of SiO<inf>2</inf>@MXene for Li-S battery

Zhang, C Feng, J Guo, X

Zhang, J

Zhang, W Zhang, L Song, J Shao, G Wang, G

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Publisher:: AIP Publishing
Publication Type:: Journal Article
Citation:: Applied Physics Letters, 2023, 122, (19)
Issue Date:: 2023-05-09

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Field	Value	Language
dc.contributor.author	Zhang, C
dc.contributor.author	Feng, J
dc.contributor.author	Guo, X https://orcid.org/0000-0001-7771-0463
dc.contributor.author	Zhang, J https://orcid.org/0000-0001-5476-0134
dc.contributor.author	Zhang, W
dc.contributor.author	Zhang, L
dc.contributor.author	Song, J
dc.contributor.author	Shao, G
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.date.accessioned	2024-02-21T01:27:46Z
dc.date.available	2024-02-21T01:27:46Z
dc.date.issued	2023-05-09
dc.identifier.citation	Applied Physics Letters, 2023, 122, (19)
dc.identifier.issn	0003-6951
dc.identifier.issn	1077-3118
dc.identifier.uri	http://hdl.handle.net/10453/175786
dc.description.abstract	Lithium-sulfur (Li-S) batteries have attracted increasing attention for next-generation energy storage systems with a high energy density and low cost. However, the practical applications have been plagued by the sluggish reaction kinetics and the shuttle effect of lithium polysulfides (LiPSs). Herein, core-shell SiO2@Ti3C2Tx MXene (SiO2@MX) hollow spheres are constructed as multifunctional catalysts to boost the performance of Li-S batteries. The dual-polar and dual-physical properties of SiO2 core and MXene shell provide multiple defense lines to the shuttle effect by chemical and physical confinement to LiPSs. Density functional theory calculations prove that Ti3C2Tx MXene and SiO2 enable the stronger trapping ability of LiPSs and the fast Li2S decomposition process. With this strategy, the robust SiO2@MX/S electrodes deliver superior electrochemical performances, including a high capacity of 1263 mAh g−1, and remarkable cycling stability with an ultralow capacity decay of 0.04% per cycle over 1000 cycles at 1 C. This work highlights the significance of core-shell dual-polar structural sulfur catalysts for practical application in advanced Li-S batteries.
dc.language	English
dc.publisher	AIP Publishing
dc.relation.ispartof	Applied Physics Letters
dc.relation.isbasedon	10.1063/5.0147522
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.rights	This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in ‘Blocking polysulfide by physical confinement and catalytic conversion of SiO2@MXene for Li–S battery. Applied Physics Letters 122, 193901 (2023) and may be found at https://doi.org/10.1063/5.0147522
dc.subject	02 Physical Sciences, 09 Engineering, 10 Technology
dc.subject.classification	Applied Physics
dc.subject.classification	40 Engineering
dc.subject.classification	51 Physical sciences
dc.title	Blocking polysulfide by physical confinement and catalytic conversion of SiO<inf>2</inf>@MXene for Li-S battery
dc.type	Journal Article
utslib.citation.volume	122
utslib.for	02 Physical Sciences
utslib.for	09 Engineering
utslib.for	10 Technology
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2024-05-08T00:00:00+1000Z
dc.date.updated	2024-02-21T01:27:44Z
pubs.issue	19
pubs.publication-status	Published
pubs.volume	122
utslib.citation.issue	19

Abstract:

Lithium-sulfur (Li-S) batteries have attracted increasing attention for next-generation energy storage systems with a high energy density and low cost. However, the practical applications have been plagued by the sluggish reaction kinetics and the shuttle effect of lithium polysulfides (LiPSs). Herein, core-shell SiO2@Ti3C2Tx MXene (SiO2@MX) hollow spheres are constructed as multifunctional catalysts to boost the performance of Li-S batteries. The dual-polar and dual-physical properties of SiO2 core and MXene shell provide multiple defense lines to the shuttle effect by chemical and physical confinement to LiPSs. Density functional theory calculations prove that Ti3C2Tx MXene and SiO2 enable the stronger trapping ability of LiPSs and the fast Li2S decomposition process. With this strategy, the robust SiO2@MX/S electrodes deliver superior electrochemical performances, including a high capacity of 1263 mAh g−1, and remarkable cycling stability with an ultralow capacity decay of 0.04% per cycle over 1000 cycles at 1 C. This work highlights the significance of core-shell dual-polar structural sulfur catalysts for practical application in advanced Li-S batteries.

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